Marbles

How to play: Press 'Run' and then click-and-drag the golden ball. Clear the board within the given number of moves. Bonus points are awarded for keeping the golden ball on the board when it is cleared, and for finishing in fewer moves than indicated. You earn an additional try for every three boards cleared.

New in this version: More (and more interesting) levels.

Ideas for the future: Levels (so that you only go to the beginning of the current level when you lose, not the very start of the game). "Black marbles": these must not fall of the board (but will be somewhat in the way). Smoking marbles (these must be cleared off the board within a given time, or they'll explode...)

@Green_Code, actually, no. All the energy would be transferred to the forward marble and the one doing the hitting would presumably stop. In real life, the only difference would be due to the roll of the first marble. Compare them to, lets say, billiard balls. The one doing the hitting would roll slightly forward. The only ways the hitting marble would reverse is if it had back-spin on it during contact OR if the second marble had more mass than the first (provided no other objects are influencing the system).

@theonlybenjamin, You can Download all book scenarios from https://www.greenfoot.org/book/material/book-scenarios.zip and from that go inside the folder and follow;
book-scenarios>chapter13>marbles. You will have other scenarios, too. if you want you can copy the marbles folder to another folder and delete the other scenarios(I think I will keep them to explore more about them).